On Cygwin use a binary based hash function for floating point numbers, as

Cygwin doesn't have decent floating point functions for long doubles.


[SVN r39694]

libs/functional

@@ -1 +1 @@
-Subproject commit ce7a9c057be1aa60884aa97564b563f28f9cae92
+Subproject commit af3b9c6b589317284954a335143dc7cae634313d